Lin Xiaoai, Luo Longzao, Mao Zhitong, Wang Huimin, Chu Shiyu, Wang Hui, Luo Shuang
School of Chemistry and Environmental Science, Shangrao Normal University, Shangrao 334001, China.
College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
Polymers (Basel). 2022 Oct 15;14(20):4349. doi: 10.3390/polym14204349.
Microplastics (MPs) have been proven to be one of the major threats to the wastewater treatment system. However, the impact of MPs on microalgae-based wastewater treatment technology are still unknown. In this study, effects of polyvinyl chloride (PVC), polypropylene (PP), and polyethylene (PE) on the removal of nitrogen and phosphorus from synthetic piggery digestate by microalgae were investigated. Results show that the effect of PVC particle size on the growth of microalgae was significant. The effects of PVC content, PP particle size and content, PET particle size and content on the growth of microalgae were all not significant. The removal of ammonia nitrogen by microalgae was influenced significantly by PVC particle size and content, PP particle size and content, the effects of PET particle size and content on the removal of ammonia nitrogen were all not significant. The effects of particle size and content for three MPs on the removal of total phosphorus were all significant. Microalgae cells were bound together after being adsorbed by MPs, which increased the secretion of extracellular polymers and influenced the removal of ammonia nitrogen and total phosphorus.
微塑料（MPs）已被证明是废水处理系统的主要威胁之一。然而，微塑料对基于微藻的废水处理技术的影响仍不明确。在本研究中，研究了聚氯乙烯（PVC）、聚丙烯（PP）和聚乙烯（PE）对微藻去除合成猪场沼液中氮和磷的影响。结果表明，PVC粒径对微藻生长的影响显著。PVC含量、PP粒径和含量、PET粒径和含量对微藻生长的影响均不显著。PVC粒径和含量、PP粒径和含量对微藻去除氨氮有显著影响，PET粒径和含量对氨氮去除的影响均不显著。三种微塑料的粒径和含量对总磷去除的影响均显著。微藻细胞被微塑料吸附后聚集在一起，这增加了细胞外聚合物的分泌，并影响了氨氮和总磷的去除。
